2016-12-09T15:20:09ZFCNC processes in the Littlest Higgs model with T-parity: an updatehttp://hdl.handle.net/2307/233
<Title>FCNC processes in the Littlest Higgs model with T-parity: an update</Title>
<Authors>Blanke, Monika; Buras, Andrzej J.; Duling, Bjoern; Recksiegel, Stefan; Tarantino, Cecilia</Authors>
<Issue Date>2010-03</Issue Date>
<Is part of>Acta Physica Polonica B</Is part of>
<Volume>41</Volume>
<Pages>657-683</Pages>
<Abstract>We update our 2006–2007 results for FCNC processes in the Littlest
Higgs model with T-parity (LHT). The removal of the logarithmic UV
cutoff dependence in our previous results through a new contribution to
the Z0-penguin diagrams identified by Goto et al. and del Aguila et al.,
while making the deviations from the SM expectations in the quark sector
less spectacular, still allows for sizable new physics effects in K !
and KL ! 0`+`􀀀 decays and in the CP-asymmetry S with the latter
unaffected by the new contribution. We extend our analysis by a study
of the fine-tuning required to fit the data on "K and by the inclusion of
the decay KL ! + 􀀀. A number of correlations can distinguish this
model from the custodially protected Randall–Sundrum model analysed
recently. We also reconsider lepton flavour violating decays, including now
a discussion of fine-tuning. While the `i ! `j
decays are unaffected
by the removal of the logarithmic cutoff dependence, the branching ratios
for decays with three leptons in the final state, like ! 3e are lowered
by almost an order of magnitude. In spite of this, the pattern of lepton
flavour violation in the LHT model can still be distinguished from the one
in supersymmetric models.</Abstract>2010-02-28T23:00:00Z